Schist with Biotite and Quartz
Biotite-Quartz Schist (Fe,Mg,Al silicate mix)
metamorphic
Category
Metamorphic And Mineral
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Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Quartz Vein in Greenstone
Hydrothermal Quartz (SiO2) with Chlorite/Epidote Schist host rock
metamorphic
Tiger’s eye
Quartz (SiO₂), fibrous pseudomorph after crocidolite
gemstone
Schist
Mica Schist
metamorphic
Quartzite Cobble
Metamorphic Quartzite (SiO2)
metamorphic
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Amazonite
Microcline (K(AlSi3O8))
mineral
Tumbled rhodonite
Rhodonite, manganese inosilicate (MnSiO₃)
mineral
Tumbled green aventurine
Quartz (SiO₂), commonly containing fuchsite mica inclusions
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Lazulite Quartzite
Quartzite with Lazulite (SiO2 with (Mg,Fe)Al2(PO4)2(OH)2)
metamorphic
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Rough amber-colored quartz or calcite fragment
Likely quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing
mineral
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite/Limonite
mineral
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Mica Schist
Mica Schist (Quartz-Mica Schist)
metamorphic
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Small tumbled pebble (likely quartz or feldspar)
Indeterminate; probable quartz (SiO₂) or feldspar
mineral
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Lapis Lazuli
Lazurite-rich metamorphic rock
metamorphic
Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Quartz (Tumbled)
SiO2 (Silicon Dioxide)
mineral
Quartz (Citrine or Iron-Stained)
SiO2
mineral
Gneiss (Metamorphic Pebble)
Gneissic Metamorphic Rock
metamorphic
Microcline Feldspar
KAlSi3O8
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Graphite
Graphite (Carbon, C)
mineral
Rhodonite
Rhodonite (MnSiO3)
Mineral
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
mineral
Gneiss (probable banded metamorphic rock)
Banded gneiss; typically quartz–feldspar–mica assemblage
metamorphic
Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Iron-stained quartz vein rock
Quartz-rich vein material, predominantly SiO₂, with iron oxyhydroxides (goethite/limonite) and likely sulfide alteration
metamorphic
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Granitic Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Greenstone / altered mafic rock
Likely chlorite–epidote–actinolite schist or altered basalt (greenstone); exact identification requires thin-section or chemical testing.
metamorphic